Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_bufs.c |
1da177e4 | 3 | * Generic buffer template |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
11 | * | |
12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
14 | * All Rights Reserved. | |
15 | * | |
16 | * Permission is hereby granted, free of charge, to any person obtaining a | |
17 | * copy of this software and associated documentation files (the "Software"), | |
18 | * to deal in the Software without restriction, including without limitation | |
19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
20 | * and/or sell copies of the Software, and to permit persons to whom the | |
21 | * Software is furnished to do so, subject to the following conditions: | |
22 | * | |
23 | * The above copyright notice and this permission notice (including the next | |
24 | * paragraph) shall be included in all copies or substantial portions of the | |
25 | * Software. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
33 | * OTHER DEALINGS IN THE SOFTWARE. | |
34 | */ | |
35 | ||
36 | #include <linux/vmalloc.h> | |
37 | #include "drmP.h" | |
38 | ||
d985c108 | 39 | unsigned long drm_get_resource_start(drm_device_t *dev, unsigned int resource) |
1da177e4 | 40 | { |
836cf046 DA |
41 | return pci_resource_start(dev->pdev, resource); |
42 | } | |
43 | EXPORT_SYMBOL(drm_get_resource_start); | |
1da177e4 | 44 | |
d985c108 | 45 | unsigned long drm_get_resource_len(drm_device_t *dev, unsigned int resource) |
836cf046 DA |
46 | { |
47 | return pci_resource_len(dev->pdev, resource); | |
48 | } | |
b5e89ed5 | 49 | |
836cf046 | 50 | EXPORT_SYMBOL(drm_get_resource_len); |
1da177e4 | 51 | |
d985c108 DA |
52 | static drm_map_list_t *drm_find_matching_map(drm_device_t *dev, |
53 | drm_local_map_t *map) | |
836cf046 DA |
54 | { |
55 | struct list_head *list; | |
1da177e4 | 56 | |
836cf046 DA |
57 | list_for_each(list, &dev->maplist->head) { |
58 | drm_map_list_t *entry = list_entry(list, drm_map_list_t, head); | |
59 | if (entry->map && map->type == entry->map->type && | |
60 | entry->map->offset == map->offset) { | |
89625eb1 | 61 | return entry; |
836cf046 DA |
62 | } |
63 | } | |
64 | ||
65 | return NULL; | |
1da177e4 | 66 | } |
1da177e4 | 67 | |
fb41e54b AB |
68 | static int drm_map_handle(drm_device_t *dev, drm_hash_item_t *hash, |
69 | unsigned long user_token, int hashed_handle) | |
d1f2b55a | 70 | { |
8d153f71 | 71 | int use_hashed_handle; |
c2604ce0 | 72 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
73 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
74 | #elif (BITS_PER_LONG == 32) | |
75 | use_hashed_handle = hashed_handle; | |
76 | #else | |
77 | #error Unsupported long size. Neither 64 nor 32 bits. | |
78 | #endif | |
d1f2b55a | 79 | |
e08870c8 TH |
80 | if (!use_hashed_handle) { |
81 | int ret; | |
1545085a | 82 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
83 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
84 | if (ret != -EINVAL) | |
85 | return ret; | |
d1f2b55a | 86 | } |
e08870c8 TH |
87 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
88 | user_token, 32 - PAGE_SHIFT - 3, | |
1545085a | 89 | 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT); |
d1f2b55a | 90 | } |
9a186645 | 91 | |
1da177e4 LT |
92 | /** |
93 | * Ioctl to specify a range of memory that is available for mapping by a non-root process. | |
94 | * | |
95 | * \param inode device inode. | |
96 | * \param filp file pointer. | |
97 | * \param cmd command. | |
98 | * \param arg pointer to a drm_map structure. | |
99 | * \return zero on success or a negative value on error. | |
100 | * | |
101 | * Adjusts the memory offset to its absolute value according to the mapping | |
102 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
103 | * applicable and if supported by the kernel. | |
104 | */ | |
b3a83639 DA |
105 | static int drm_addmap_core(drm_device_t * dev, unsigned int offset, |
106 | unsigned int size, drm_map_type_t type, | |
107 | drm_map_flags_t flags, drm_map_list_t ** maplist) | |
1da177e4 | 108 | { |
1da177e4 | 109 | drm_map_t *map; |
1da177e4 | 110 | drm_map_list_t *list; |
9c8da5eb | 111 | drm_dma_handle_t *dmah; |
8d153f71 TH |
112 | unsigned long user_token; |
113 | int ret; | |
1da177e4 | 114 | |
b5e89ed5 DA |
115 | map = drm_alloc(sizeof(*map), DRM_MEM_MAPS); |
116 | if (!map) | |
1da177e4 LT |
117 | return -ENOMEM; |
118 | ||
7ab98401 DA |
119 | map->offset = offset; |
120 | map->size = size; | |
121 | map->flags = flags; | |
122 | map->type = type; | |
1da177e4 LT |
123 | |
124 | /* Only allow shared memory to be removable since we only keep enough | |
125 | * book keeping information about shared memory to allow for removal | |
126 | * when processes fork. | |
127 | */ | |
b5e89ed5 DA |
128 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
129 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
130 | return -EINVAL; |
131 | } | |
b5e89ed5 DA |
132 | DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n", |
133 | map->offset, map->size, map->type); | |
134 | if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) { | |
135 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
136 | return -EINVAL; |
137 | } | |
b5e89ed5 | 138 | map->mtrr = -1; |
1da177e4 LT |
139 | map->handle = NULL; |
140 | ||
b5e89ed5 | 141 | switch (map->type) { |
1da177e4 LT |
142 | case _DRM_REGISTERS: |
143 | case _DRM_FRAME_BUFFER: | |
88f399cd | 144 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) |
8d2ea625 | 145 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 DA |
146 | map->offset < virt_to_phys(high_memory)) { |
147 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
148 | return -EINVAL; |
149 | } | |
150 | #endif | |
151 | #ifdef __alpha__ | |
152 | map->offset += dev->hose->mem_space->start; | |
153 | #endif | |
836cf046 DA |
154 | /* Some drivers preinitialize some maps, without the X Server |
155 | * needing to be aware of it. Therefore, we just return success | |
156 | * when the server tries to create a duplicate map. | |
157 | */ | |
89625eb1 DA |
158 | list = drm_find_matching_map(dev, map); |
159 | if (list != NULL) { | |
160 | if (list->map->size != map->size) { | |
836cf046 | 161 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
162 | "mismatched sizes, (%ld vs %ld)\n", |
163 | map->type, map->size, | |
164 | list->map->size); | |
89625eb1 | 165 | list->map->size = map->size; |
836cf046 DA |
166 | } |
167 | ||
168 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
89625eb1 | 169 | *maplist = list; |
836cf046 DA |
170 | return 0; |
171 | } | |
172 | ||
1da177e4 | 173 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
174 | if (map->type == _DRM_FRAME_BUFFER || |
175 | (map->flags & _DRM_WRITE_COMBINING)) { | |
176 | map->mtrr = mtrr_add(map->offset, map->size, | |
177 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
178 | } |
179 | } | |
180 | if (map->type == _DRM_REGISTERS) | |
004a7727 | 181 | map->handle = ioremap(map->offset, map->size); |
1da177e4 LT |
182 | break; |
183 | ||
184 | case _DRM_SHM: | |
f239b7b0 | 185 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
186 | DRM_DEBUG("%lu %d %p\n", |
187 | map->size, drm_order(map->size), map->handle); | |
188 | if (!map->handle) { | |
189 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
190 | return -ENOMEM; |
191 | } | |
192 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 193 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 LT |
194 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
195 | if (dev->lock.hw_lock != NULL) { | |
b5e89ed5 DA |
196 | vfree(map->handle); |
197 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
1da177e4 LT |
198 | return -EBUSY; |
199 | } | |
b5e89ed5 | 200 | dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
201 | } |
202 | break; | |
203 | case _DRM_AGP: | |
204 | if (drm_core_has_AGP(dev)) { | |
205 | #ifdef __alpha__ | |
206 | map->offset += dev->hose->mem_space->start; | |
207 | #endif | |
208 | map->offset += dev->agp->base; | |
b5e89ed5 | 209 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
1da177e4 LT |
210 | } |
211 | break; | |
212 | case _DRM_SCATTER_GATHER: | |
213 | if (!dev->sg) { | |
214 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); | |
215 | return -EINVAL; | |
216 | } | |
d1f2b55a | 217 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 218 | break; |
b5e89ed5 | 219 | case _DRM_CONSISTENT: |
2d0f9eaf | 220 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 221 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
222 | * casting it down to 32 bits is no problem, but we |
223 | * need to point to a 64bit variable first. */ | |
9c8da5eb DA |
224 | dmah = drm_pci_alloc(dev, map->size, map->size, 0xffffffffUL); |
225 | if (!dmah) { | |
2d0f9eaf DA |
226 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
227 | return -ENOMEM; | |
228 | } | |
9c8da5eb DA |
229 | map->handle = dmah->vaddr; |
230 | map->offset = (unsigned long)dmah->busaddr; | |
231 | kfree(dmah); | |
2d0f9eaf | 232 | break; |
1da177e4 | 233 | default: |
b5e89ed5 | 234 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
1da177e4 LT |
235 | return -EINVAL; |
236 | } | |
237 | ||
238 | list = drm_alloc(sizeof(*list), DRM_MEM_MAPS); | |
b5e89ed5 | 239 | if (!list) { |
85abb3f9 | 240 | if (map->type == _DRM_REGISTERS) |
004a7727 | 241 | iounmap(map->handle); |
1da177e4 LT |
242 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
243 | return -EINVAL; | |
244 | } | |
245 | memset(list, 0, sizeof(*list)); | |
246 | list->map = map; | |
247 | ||
30e2fb18 | 248 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 249 | list_add(&list->head, &dev->maplist->head); |
8d153f71 | 250 | |
d1f2b55a | 251 | /* Assign a 32-bit handle */ |
30e2fb18 | 252 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
253 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
254 | map->offset; | |
a1d0fcf5 | 255 | ret = drm_map_handle(dev, &list->hash, user_token, 0); |
8d153f71 | 256 | if (ret) { |
85abb3f9 | 257 | if (map->type == _DRM_REGISTERS) |
004a7727 | 258 | iounmap(map->handle); |
8d153f71 TH |
259 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
260 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); | |
261 | mutex_unlock(&dev->struct_mutex); | |
262 | return ret; | |
263 | } | |
264 | ||
1545085a | 265 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 266 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 267 | |
89625eb1 | 268 | *maplist = list; |
7ab98401 DA |
269 | return 0; |
270 | } | |
89625eb1 | 271 | |
b5e89ed5 | 272 | int drm_addmap(drm_device_t * dev, unsigned int offset, |
89625eb1 | 273 | unsigned int size, drm_map_type_t type, |
b5e89ed5 | 274 | drm_map_flags_t flags, drm_local_map_t ** map_ptr) |
89625eb1 DA |
275 | { |
276 | drm_map_list_t *list; | |
277 | int rc; | |
278 | ||
279 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
280 | if (!rc) | |
281 | *map_ptr = list->map; | |
282 | return rc; | |
283 | } | |
b5e89ed5 | 284 | |
7ab98401 DA |
285 | EXPORT_SYMBOL(drm_addmap); |
286 | ||
287 | int drm_addmap_ioctl(struct inode *inode, struct file *filp, | |
288 | unsigned int cmd, unsigned long arg) | |
289 | { | |
290 | drm_file_t *priv = filp->private_data; | |
291 | drm_device_t *dev = priv->head->dev; | |
292 | drm_map_t map; | |
89625eb1 | 293 | drm_map_list_t *maplist; |
7ab98401 DA |
294 | drm_map_t __user *argp = (void __user *)arg; |
295 | int err; | |
296 | ||
297 | if (!(filp->f_mode & 3)) | |
298 | return -EACCES; /* Require read/write */ | |
299 | ||
b5e89ed5 | 300 | if (copy_from_user(&map, argp, sizeof(map))) { |
1da177e4 | 301 | return -EFAULT; |
7ab98401 DA |
302 | } |
303 | ||
d985c108 DA |
304 | if (!(capable(CAP_SYS_ADMIN) || map.type == _DRM_AGP)) |
305 | return -EPERM; | |
306 | ||
89625eb1 DA |
307 | err = drm_addmap_core(dev, map.offset, map.size, map.type, map.flags, |
308 | &maplist); | |
7ab98401 | 309 | |
b5e89ed5 | 310 | if (err) |
7ab98401 | 311 | return err; |
d1f2b55a | 312 | |
89625eb1 | 313 | if (copy_to_user(argp, maplist->map, sizeof(drm_map_t))) |
d1f2b55a | 314 | return -EFAULT; |
67e1a014 DA |
315 | |
316 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ | |
317 | if (put_user((void *)(unsigned long)maplist->user_token, &argp->handle)) | |
d1f2b55a | 318 | return -EFAULT; |
1da177e4 | 319 | return 0; |
88f399cd | 320 | } |
1da177e4 | 321 | |
1da177e4 LT |
322 | /** |
323 | * Remove a map private from list and deallocate resources if the mapping | |
324 | * isn't in use. | |
325 | * | |
326 | * \param inode device inode. | |
327 | * \param filp file pointer. | |
328 | * \param cmd command. | |
329 | * \param arg pointer to a drm_map_t structure. | |
330 | * \return zero on success or a negative value on error. | |
331 | * | |
332 | * Searches the map on drm_device::maplist, removes it from the list, see if | |
333 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
334 | * being on use. | |
335 | * | |
7ab98401 | 336 | * \sa drm_addmap |
1da177e4 | 337 | */ |
d985c108 | 338 | int drm_rmmap_locked(drm_device_t *dev, drm_local_map_t *map) |
1da177e4 | 339 | { |
1da177e4 LT |
340 | struct list_head *list; |
341 | drm_map_list_t *r_list = NULL; | |
836cf046 | 342 | drm_dma_handle_t dmah; |
1da177e4 | 343 | |
836cf046 | 344 | /* Find the list entry for the map and remove it */ |
1da177e4 LT |
345 | list_for_each(list, &dev->maplist->head) { |
346 | r_list = list_entry(list, drm_map_list_t, head); | |
347 | ||
836cf046 DA |
348 | if (r_list->map == map) { |
349 | list_del(list); | |
1545085a TH |
350 | drm_ht_remove_key(&dev->map_hash, |
351 | r_list->user_token >> PAGE_SHIFT); | |
836cf046 DA |
352 | drm_free(list, sizeof(*list), DRM_MEM_MAPS); |
353 | break; | |
354 | } | |
1da177e4 LT |
355 | } |
356 | ||
836cf046 DA |
357 | /* List has wrapped around to the head pointer, or it's empty and we |
358 | * didn't find anything. | |
1da177e4 | 359 | */ |
836cf046 | 360 | if (list == (&dev->maplist->head)) { |
1da177e4 LT |
361 | return -EINVAL; |
362 | } | |
1da177e4 | 363 | |
836cf046 DA |
364 | switch (map->type) { |
365 | case _DRM_REGISTERS: | |
004a7727 | 366 | iounmap(map->handle); |
836cf046 DA |
367 | /* FALLTHROUGH */ |
368 | case _DRM_FRAME_BUFFER: | |
369 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
370 | int retcode; | |
b5e89ed5 DA |
371 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
372 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 373 | } |
836cf046 DA |
374 | break; |
375 | case _DRM_SHM: | |
376 | vfree(map->handle); | |
377 | break; | |
378 | case _DRM_AGP: | |
379 | case _DRM_SCATTER_GATHER: | |
380 | break; | |
381 | case _DRM_CONSISTENT: | |
382 | dmah.vaddr = map->handle; | |
383 | dmah.busaddr = map->offset; | |
384 | dmah.size = map->size; | |
385 | __drm_pci_free(dev, &dmah); | |
386 | break; | |
1da177e4 | 387 | } |
836cf046 DA |
388 | drm_free(map, sizeof(*map), DRM_MEM_MAPS); |
389 | ||
1da177e4 LT |
390 | return 0; |
391 | } | |
836cf046 | 392 | |
d985c108 | 393 | int drm_rmmap(drm_device_t *dev, drm_local_map_t *map) |
836cf046 DA |
394 | { |
395 | int ret; | |
396 | ||
30e2fb18 | 397 | mutex_lock(&dev->struct_mutex); |
836cf046 | 398 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 399 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
400 | |
401 | return ret; | |
402 | } | |
7ab98401 | 403 | |
836cf046 DA |
404 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
405 | * the last close of the device, and this is necessary for cleanup when things | |
406 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
407 | * like a pointless exercise since they're going away anyway. | |
408 | * | |
409 | * One use case might be after addmap is allowed for normal users for SHM and | |
410 | * gets used by drivers that the server doesn't need to care about. This seems | |
411 | * unlikely. | |
412 | */ | |
7ab98401 DA |
413 | int drm_rmmap_ioctl(struct inode *inode, struct file *filp, |
414 | unsigned int cmd, unsigned long arg) | |
415 | { | |
416 | drm_file_t *priv = filp->private_data; | |
417 | drm_device_t *dev = priv->head->dev; | |
418 | drm_map_t request; | |
836cf046 DA |
419 | drm_local_map_t *map = NULL; |
420 | struct list_head *list; | |
421 | int ret; | |
7ab98401 | 422 | |
b5e89ed5 | 423 | if (copy_from_user(&request, (drm_map_t __user *) arg, sizeof(request))) { |
7ab98401 DA |
424 | return -EFAULT; |
425 | } | |
426 | ||
30e2fb18 | 427 | mutex_lock(&dev->struct_mutex); |
836cf046 DA |
428 | list_for_each(list, &dev->maplist->head) { |
429 | drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head); | |
430 | ||
431 | if (r_list->map && | |
b5e89ed5 | 432 | r_list->user_token == (unsigned long)request.handle && |
836cf046 DA |
433 | r_list->map->flags & _DRM_REMOVABLE) { |
434 | map = r_list->map; | |
435 | break; | |
436 | } | |
437 | } | |
438 | ||
439 | /* List has wrapped around to the head pointer, or its empty we didn't | |
440 | * find anything. | |
441 | */ | |
442 | if (list == (&dev->maplist->head)) { | |
30e2fb18 | 443 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
444 | return -EINVAL; |
445 | } | |
446 | ||
7a3f1f21 TH |
447 | if (!map) { |
448 | mutex_unlock(&dev->struct_mutex); | |
836cf046 | 449 | return -EINVAL; |
7a3f1f21 | 450 | } |
836cf046 DA |
451 | |
452 | /* Register and framebuffer maps are permanent */ | |
453 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 454 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
455 | return 0; |
456 | } | |
457 | ||
458 | ret = drm_rmmap_locked(dev, map); | |
459 | ||
30e2fb18 | 460 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
461 | |
462 | return ret; | |
7ab98401 | 463 | } |
1da177e4 LT |
464 | |
465 | /** | |
466 | * Cleanup after an error on one of the addbufs() functions. | |
467 | * | |
836cf046 | 468 | * \param dev DRM device. |
1da177e4 LT |
469 | * \param entry buffer entry where the error occurred. |
470 | * | |
471 | * Frees any pages and buffers associated with the given entry. | |
472 | */ | |
b5e89ed5 | 473 | static void drm_cleanup_buf_error(drm_device_t * dev, drm_buf_entry_t * entry) |
1da177e4 LT |
474 | { |
475 | int i; | |
476 | ||
477 | if (entry->seg_count) { | |
478 | for (i = 0; i < entry->seg_count; i++) { | |
479 | if (entry->seglist[i]) { | |
ddf19b97 | 480 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
481 | } |
482 | } | |
483 | drm_free(entry->seglist, | |
b5e89ed5 DA |
484 | entry->seg_count * |
485 | sizeof(*entry->seglist), DRM_MEM_SEGS); | |
1da177e4 LT |
486 | |
487 | entry->seg_count = 0; | |
488 | } | |
489 | ||
b5e89ed5 DA |
490 | if (entry->buf_count) { |
491 | for (i = 0; i < entry->buf_count; i++) { | |
1da177e4 LT |
492 | if (entry->buflist[i].dev_private) { |
493 | drm_free(entry->buflist[i].dev_private, | |
b5e89ed5 DA |
494 | entry->buflist[i].dev_priv_size, |
495 | DRM_MEM_BUFS); | |
1da177e4 LT |
496 | } |
497 | } | |
498 | drm_free(entry->buflist, | |
b5e89ed5 DA |
499 | entry->buf_count * |
500 | sizeof(*entry->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
501 | |
502 | entry->buf_count = 0; | |
503 | } | |
504 | } | |
505 | ||
506 | #if __OS_HAS_AGP | |
507 | /** | |
d59431bf | 508 | * Add AGP buffers for DMA transfers. |
1da177e4 | 509 | * |
d59431bf DA |
510 | * \param dev drm_device_t to which the buffers are to be added. |
511 | * \param request pointer to a drm_buf_desc_t describing the request. | |
1da177e4 | 512 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 513 | * |
1da177e4 LT |
514 | * After some sanity checks creates a drm_buf structure for each buffer and |
515 | * reallocates the buffer list of the same size order to accommodate the new | |
516 | * buffers. | |
517 | */ | |
b5e89ed5 | 518 | int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 519 | { |
1da177e4 | 520 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
521 | drm_buf_entry_t *entry; |
522 | drm_buf_t *buf; | |
523 | unsigned long offset; | |
524 | unsigned long agp_offset; | |
525 | int count; | |
526 | int order; | |
527 | int size; | |
528 | int alignment; | |
529 | int page_order; | |
530 | int total; | |
531 | int byte_count; | |
532 | int i; | |
533 | drm_buf_t **temp_buflist; | |
1da177e4 | 534 | |
b5e89ed5 DA |
535 | if (!dma) |
536 | return -EINVAL; | |
1da177e4 | 537 | |
d59431bf DA |
538 | count = request->count; |
539 | order = drm_order(request->size); | |
1da177e4 LT |
540 | size = 1 << order; |
541 | ||
b5e89ed5 DA |
542 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
543 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
544 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
545 | total = PAGE_SIZE << page_order; | |
546 | ||
547 | byte_count = 0; | |
d59431bf | 548 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 549 | |
b5e89ed5 DA |
550 | DRM_DEBUG("count: %d\n", count); |
551 | DRM_DEBUG("order: %d\n", order); | |
552 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 553 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
554 | DRM_DEBUG("alignment: %d\n", alignment); |
555 | DRM_DEBUG("page_order: %d\n", page_order); | |
556 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 557 | |
b5e89ed5 DA |
558 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
559 | return -EINVAL; | |
560 | if (dev->queue_count) | |
561 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 562 | |
b5e89ed5 DA |
563 | spin_lock(&dev->count_lock); |
564 | if (dev->buf_use) { | |
565 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
566 | return -EBUSY; |
567 | } | |
b5e89ed5 DA |
568 | atomic_inc(&dev->buf_alloc); |
569 | spin_unlock(&dev->count_lock); | |
1da177e4 | 570 | |
30e2fb18 | 571 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 572 | entry = &dma->bufs[order]; |
b5e89ed5 | 573 | if (entry->buf_count) { |
30e2fb18 | 574 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
575 | atomic_dec(&dev->buf_alloc); |
576 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
577 | } |
578 | ||
579 | if (count < 0 || count > 4096) { | |
30e2fb18 | 580 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 581 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
582 | return -EINVAL; |
583 | } | |
584 | ||
b5e89ed5 DA |
585 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
586 | DRM_MEM_BUFS); | |
587 | if (!entry->buflist) { | |
30e2fb18 | 588 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 589 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
590 | return -ENOMEM; |
591 | } | |
b5e89ed5 | 592 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
593 | |
594 | entry->buf_size = size; | |
595 | entry->page_order = page_order; | |
596 | ||
597 | offset = 0; | |
598 | ||
b5e89ed5 DA |
599 | while (entry->buf_count < count) { |
600 | buf = &entry->buflist[entry->buf_count]; | |
601 | buf->idx = dma->buf_count + entry->buf_count; | |
602 | buf->total = alignment; | |
603 | buf->order = order; | |
604 | buf->used = 0; | |
1da177e4 | 605 | |
b5e89ed5 | 606 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
607 | buf->bus_address = agp_offset + offset; |
608 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 609 | buf->next = NULL; |
1da177e4 LT |
610 | buf->waiting = 0; |
611 | buf->pending = 0; | |
b5e89ed5 DA |
612 | init_waitqueue_head(&buf->dma_wait); |
613 | buf->filp = NULL; | |
1da177e4 LT |
614 | |
615 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
616 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
617 | if (!buf->dev_private) { | |
1da177e4 LT |
618 | /* Set count correctly so we free the proper amount. */ |
619 | entry->buf_count = count; | |
b5e89ed5 | 620 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 621 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 622 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
623 | return -ENOMEM; |
624 | } | |
b5e89ed5 | 625 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 626 | |
b5e89ed5 | 627 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
628 | |
629 | offset += alignment; | |
630 | entry->buf_count++; | |
631 | byte_count += PAGE_SIZE << page_order; | |
632 | } | |
633 | ||
b5e89ed5 | 634 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 635 | |
b5e89ed5 DA |
636 | temp_buflist = drm_realloc(dma->buflist, |
637 | dma->buf_count * sizeof(*dma->buflist), | |
638 | (dma->buf_count + entry->buf_count) | |
639 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
640 | if (!temp_buflist) { | |
1da177e4 | 641 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 642 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 643 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 644 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
645 | return -ENOMEM; |
646 | } | |
647 | dma->buflist = temp_buflist; | |
648 | ||
b5e89ed5 | 649 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
650 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
651 | } | |
652 | ||
653 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
654 | dma->seg_count += entry->seg_count; |
655 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
656 | dma->byte_count += byte_count; |
657 | ||
b5e89ed5 DA |
658 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
659 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 660 | |
30e2fb18 | 661 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 662 | |
d59431bf DA |
663 | request->count = entry->buf_count; |
664 | request->size = size; | |
1da177e4 LT |
665 | |
666 | dma->flags = _DRM_DMA_USE_AGP; | |
667 | ||
b5e89ed5 | 668 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
669 | return 0; |
670 | } | |
d84f76d3 | 671 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 672 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 673 | |
b5e89ed5 | 674 | int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 675 | { |
1da177e4 | 676 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
677 | int count; |
678 | int order; | |
679 | int size; | |
680 | int total; | |
681 | int page_order; | |
682 | drm_buf_entry_t *entry; | |
ddf19b97 | 683 | drm_dma_handle_t *dmah; |
1da177e4 LT |
684 | drm_buf_t *buf; |
685 | int alignment; | |
686 | unsigned long offset; | |
687 | int i; | |
688 | int byte_count; | |
689 | int page_count; | |
690 | unsigned long *temp_pagelist; | |
691 | drm_buf_t **temp_buflist; | |
1da177e4 | 692 | |
b5e89ed5 DA |
693 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
694 | return -EINVAL; | |
d985c108 | 695 | |
b5e89ed5 DA |
696 | if (!dma) |
697 | return -EINVAL; | |
1da177e4 | 698 | |
d985c108 DA |
699 | if (!capable(CAP_SYS_ADMIN)) |
700 | return -EPERM; | |
701 | ||
d59431bf DA |
702 | count = request->count; |
703 | order = drm_order(request->size); | |
1da177e4 LT |
704 | size = 1 << order; |
705 | ||
b5e89ed5 DA |
706 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
707 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 708 | |
b5e89ed5 DA |
709 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
710 | return -EINVAL; | |
711 | if (dev->queue_count) | |
712 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 713 | |
d59431bf | 714 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 715 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
716 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
717 | total = PAGE_SIZE << page_order; | |
718 | ||
b5e89ed5 DA |
719 | spin_lock(&dev->count_lock); |
720 | if (dev->buf_use) { | |
721 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
722 | return -EBUSY; |
723 | } | |
b5e89ed5 DA |
724 | atomic_inc(&dev->buf_alloc); |
725 | spin_unlock(&dev->count_lock); | |
1da177e4 | 726 | |
30e2fb18 | 727 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 728 | entry = &dma->bufs[order]; |
b5e89ed5 | 729 | if (entry->buf_count) { |
30e2fb18 | 730 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 731 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
732 | return -ENOMEM; /* May only call once for each order */ |
733 | } | |
734 | ||
735 | if (count < 0 || count > 4096) { | |
30e2fb18 | 736 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 737 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
738 | return -EINVAL; |
739 | } | |
740 | ||
b5e89ed5 DA |
741 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
742 | DRM_MEM_BUFS); | |
743 | if (!entry->buflist) { | |
30e2fb18 | 744 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 745 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
746 | return -ENOMEM; |
747 | } | |
b5e89ed5 DA |
748 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
749 | ||
750 | entry->seglist = drm_alloc(count * sizeof(*entry->seglist), | |
751 | DRM_MEM_SEGS); | |
752 | if (!entry->seglist) { | |
753 | drm_free(entry->buflist, | |
754 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
30e2fb18 | 755 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 756 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
757 | return -ENOMEM; |
758 | } | |
b5e89ed5 | 759 | memset(entry->seglist, 0, count * sizeof(*entry->seglist)); |
1da177e4 LT |
760 | |
761 | /* Keep the original pagelist until we know all the allocations | |
762 | * have succeeded | |
763 | */ | |
b5e89ed5 DA |
764 | temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) |
765 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
1da177e4 | 766 | if (!temp_pagelist) { |
b5e89ed5 DA |
767 | drm_free(entry->buflist, |
768 | count * sizeof(*entry->buflist), DRM_MEM_BUFS); | |
769 | drm_free(entry->seglist, | |
770 | count * sizeof(*entry->seglist), DRM_MEM_SEGS); | |
30e2fb18 | 771 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 772 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
773 | return -ENOMEM; |
774 | } | |
775 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
776 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
777 | DRM_DEBUG("pagelist: %d entries\n", | |
778 | dma->page_count + (count << page_order)); | |
1da177e4 | 779 | |
b5e89ed5 | 780 | entry->buf_size = size; |
1da177e4 LT |
781 | entry->page_order = page_order; |
782 | byte_count = 0; | |
783 | page_count = 0; | |
784 | ||
b5e89ed5 | 785 | while (entry->buf_count < count) { |
ddf19b97 DA |
786 | |
787 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); | |
788 | ||
789 | if (!dmah) { | |
1da177e4 LT |
790 | /* Set count correctly so we free the proper amount. */ |
791 | entry->buf_count = count; | |
792 | entry->seg_count = count; | |
793 | drm_cleanup_buf_error(dev, entry); | |
b5e89ed5 DA |
794 | drm_free(temp_pagelist, |
795 | (dma->page_count + (count << page_order)) | |
796 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 797 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 798 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
799 | return -ENOMEM; |
800 | } | |
ddf19b97 | 801 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
802 | for (i = 0; i < (1 << page_order); i++) { |
803 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
804 | dma->page_count + page_count, | |
ddf19b97 | 805 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 806 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 807 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 808 | } |
b5e89ed5 DA |
809 | for (offset = 0; |
810 | offset + size <= total && entry->buf_count < count; | |
811 | offset += alignment, ++entry->buf_count) { | |
812 | buf = &entry->buflist[entry->buf_count]; | |
813 | buf->idx = dma->buf_count + entry->buf_count; | |
814 | buf->total = alignment; | |
815 | buf->order = order; | |
816 | buf->used = 0; | |
817 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
818 | buf->address = (void *)(dmah->vaddr + offset); |
819 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 820 | buf->next = NULL; |
1da177e4 LT |
821 | buf->waiting = 0; |
822 | buf->pending = 0; | |
b5e89ed5 DA |
823 | init_waitqueue_head(&buf->dma_wait); |
824 | buf->filp = NULL; | |
1da177e4 LT |
825 | |
826 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
827 | buf->dev_private = drm_alloc(buf->dev_priv_size, |
828 | DRM_MEM_BUFS); | |
829 | if (!buf->dev_private) { | |
1da177e4 LT |
830 | /* Set count correctly so we free the proper amount. */ |
831 | entry->buf_count = count; | |
832 | entry->seg_count = count; | |
b5e89ed5 DA |
833 | drm_cleanup_buf_error(dev, entry); |
834 | drm_free(temp_pagelist, | |
835 | (dma->page_count + | |
836 | (count << page_order)) | |
837 | * sizeof(*dma->pagelist), | |
838 | DRM_MEM_PAGES); | |
30e2fb18 | 839 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 840 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
841 | return -ENOMEM; |
842 | } | |
b5e89ed5 | 843 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 844 | |
b5e89ed5 DA |
845 | DRM_DEBUG("buffer %d @ %p\n", |
846 | entry->buf_count, buf->address); | |
1da177e4 LT |
847 | } |
848 | byte_count += PAGE_SIZE << page_order; | |
849 | } | |
850 | ||
b5e89ed5 DA |
851 | temp_buflist = drm_realloc(dma->buflist, |
852 | dma->buf_count * sizeof(*dma->buflist), | |
853 | (dma->buf_count + entry->buf_count) | |
854 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1da177e4 LT |
855 | if (!temp_buflist) { |
856 | /* Free the entry because it isn't valid */ | |
b5e89ed5 DA |
857 | drm_cleanup_buf_error(dev, entry); |
858 | drm_free(temp_pagelist, | |
859 | (dma->page_count + (count << page_order)) | |
860 | * sizeof(*dma->pagelist), DRM_MEM_PAGES); | |
30e2fb18 | 861 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 862 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
863 | return -ENOMEM; |
864 | } | |
865 | dma->buflist = temp_buflist; | |
866 | ||
b5e89ed5 | 867 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
868 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
869 | } | |
870 | ||
871 | /* No allocations failed, so now we can replace the orginal pagelist | |
872 | * with the new one. | |
873 | */ | |
874 | if (dma->page_count) { | |
875 | drm_free(dma->pagelist, | |
b5e89ed5 DA |
876 | dma->page_count * sizeof(*dma->pagelist), |
877 | DRM_MEM_PAGES); | |
1da177e4 LT |
878 | } |
879 | dma->pagelist = temp_pagelist; | |
880 | ||
881 | dma->buf_count += entry->buf_count; | |
882 | dma->seg_count += entry->seg_count; | |
883 | dma->page_count += entry->seg_count << page_order; | |
884 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
885 | ||
30e2fb18 | 886 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 887 | |
d59431bf DA |
888 | request->count = entry->buf_count; |
889 | request->size = size; | |
1da177e4 | 890 | |
3417f33e GS |
891 | if (request->flags & _DRM_PCI_BUFFER_RO) |
892 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
893 | ||
b5e89ed5 | 894 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
895 | return 0; |
896 | ||
897 | } | |
d84f76d3 | 898 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 899 | |
b5e89ed5 | 900 | static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request) |
1da177e4 | 901 | { |
1da177e4 | 902 | drm_device_dma_t *dma = dev->dma; |
1da177e4 LT |
903 | drm_buf_entry_t *entry; |
904 | drm_buf_t *buf; | |
905 | unsigned long offset; | |
906 | unsigned long agp_offset; | |
907 | int count; | |
908 | int order; | |
909 | int size; | |
910 | int alignment; | |
911 | int page_order; | |
912 | int total; | |
913 | int byte_count; | |
914 | int i; | |
915 | drm_buf_t **temp_buflist; | |
916 | ||
b5e89ed5 DA |
917 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
918 | return -EINVAL; | |
919 | ||
920 | if (!dma) | |
921 | return -EINVAL; | |
1da177e4 | 922 | |
d985c108 DA |
923 | if (!capable(CAP_SYS_ADMIN)) |
924 | return -EPERM; | |
925 | ||
d59431bf DA |
926 | count = request->count; |
927 | order = drm_order(request->size); | |
1da177e4 LT |
928 | size = 1 << order; |
929 | ||
b5e89ed5 DA |
930 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
931 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
932 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
933 | total = PAGE_SIZE << page_order; | |
934 | ||
935 | byte_count = 0; | |
d59431bf | 936 | agp_offset = request->agp_start; |
1da177e4 | 937 | |
b5e89ed5 DA |
938 | DRM_DEBUG("count: %d\n", count); |
939 | DRM_DEBUG("order: %d\n", order); | |
940 | DRM_DEBUG("size: %d\n", size); | |
941 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
942 | DRM_DEBUG("alignment: %d\n", alignment); | |
943 | DRM_DEBUG("page_order: %d\n", page_order); | |
944 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 945 | |
b5e89ed5 DA |
946 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
947 | return -EINVAL; | |
948 | if (dev->queue_count) | |
949 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 950 | |
b5e89ed5 DA |
951 | spin_lock(&dev->count_lock); |
952 | if (dev->buf_use) { | |
953 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
954 | return -EBUSY; |
955 | } | |
b5e89ed5 DA |
956 | atomic_inc(&dev->buf_alloc); |
957 | spin_unlock(&dev->count_lock); | |
1da177e4 | 958 | |
30e2fb18 | 959 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 960 | entry = &dma->bufs[order]; |
b5e89ed5 | 961 | if (entry->buf_count) { |
30e2fb18 | 962 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
963 | atomic_dec(&dev->buf_alloc); |
964 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
965 | } |
966 | ||
967 | if (count < 0 || count > 4096) { | |
30e2fb18 | 968 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 969 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
970 | return -EINVAL; |
971 | } | |
972 | ||
b5e89ed5 DA |
973 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), |
974 | DRM_MEM_BUFS); | |
975 | if (!entry->buflist) { | |
30e2fb18 | 976 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 977 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
978 | return -ENOMEM; |
979 | } | |
b5e89ed5 | 980 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); |
1da177e4 LT |
981 | |
982 | entry->buf_size = size; | |
983 | entry->page_order = page_order; | |
984 | ||
985 | offset = 0; | |
986 | ||
b5e89ed5 DA |
987 | while (entry->buf_count < count) { |
988 | buf = &entry->buflist[entry->buf_count]; | |
989 | buf->idx = dma->buf_count + entry->buf_count; | |
990 | buf->total = alignment; | |
991 | buf->order = order; | |
992 | buf->used = 0; | |
1da177e4 | 993 | |
b5e89ed5 | 994 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 995 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 996 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 997 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 998 | buf->next = NULL; |
1da177e4 LT |
999 | buf->waiting = 0; |
1000 | buf->pending = 0; | |
b5e89ed5 DA |
1001 | init_waitqueue_head(&buf->dma_wait); |
1002 | buf->filp = NULL; | |
1da177e4 LT |
1003 | |
1004 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
b5e89ed5 DA |
1005 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); |
1006 | if (!buf->dev_private) { | |
1da177e4 LT |
1007 | /* Set count correctly so we free the proper amount. */ |
1008 | entry->buf_count = count; | |
b5e89ed5 | 1009 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1010 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1011 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1012 | return -ENOMEM; |
1013 | } | |
1014 | ||
b5e89ed5 | 1015 | memset(buf->dev_private, 0, buf->dev_priv_size); |
1da177e4 | 1016 | |
b5e89ed5 | 1017 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1018 | |
1019 | offset += alignment; | |
1020 | entry->buf_count++; | |
1021 | byte_count += PAGE_SIZE << page_order; | |
1022 | } | |
1023 | ||
b5e89ed5 | 1024 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1025 | |
b5e89ed5 DA |
1026 | temp_buflist = drm_realloc(dma->buflist, |
1027 | dma->buf_count * sizeof(*dma->buflist), | |
1028 | (dma->buf_count + entry->buf_count) | |
1029 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1030 | if (!temp_buflist) { | |
1da177e4 | 1031 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1032 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1033 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1034 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1035 | return -ENOMEM; |
1036 | } | |
1037 | dma->buflist = temp_buflist; | |
1038 | ||
b5e89ed5 | 1039 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1040 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1041 | } | |
1042 | ||
1043 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1044 | dma->seg_count += entry->seg_count; |
1045 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1046 | dma->byte_count += byte_count; |
1047 | ||
b5e89ed5 DA |
1048 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1049 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1050 | |
30e2fb18 | 1051 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1052 | |
d59431bf DA |
1053 | request->count = entry->buf_count; |
1054 | request->size = size; | |
1da177e4 LT |
1055 | |
1056 | dma->flags = _DRM_DMA_USE_SG; | |
1057 | ||
b5e89ed5 | 1058 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1059 | return 0; |
1060 | } | |
1061 | ||
5d23fafb | 1062 | static int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request) |
b84397d6 | 1063 | { |
b84397d6 | 1064 | drm_device_dma_t *dma = dev->dma; |
b84397d6 DA |
1065 | drm_buf_entry_t *entry; |
1066 | drm_buf_t *buf; | |
1067 | unsigned long offset; | |
1068 | unsigned long agp_offset; | |
1069 | int count; | |
1070 | int order; | |
1071 | int size; | |
1072 | int alignment; | |
1073 | int page_order; | |
1074 | int total; | |
1075 | int byte_count; | |
1076 | int i; | |
1077 | drm_buf_t **temp_buflist; | |
b84397d6 DA |
1078 | |
1079 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1080 | return -EINVAL; | |
b5e89ed5 | 1081 | |
b84397d6 DA |
1082 | if (!dma) |
1083 | return -EINVAL; | |
1084 | ||
d985c108 DA |
1085 | if (!capable(CAP_SYS_ADMIN)) |
1086 | return -EPERM; | |
1087 | ||
d59431bf DA |
1088 | count = request->count; |
1089 | order = drm_order(request->size); | |
b84397d6 DA |
1090 | size = 1 << order; |
1091 | ||
d59431bf | 1092 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1093 | ? PAGE_ALIGN(size) : size; |
1094 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1095 | total = PAGE_SIZE << page_order; | |
1096 | ||
1097 | byte_count = 0; | |
d59431bf | 1098 | agp_offset = request->agp_start; |
b84397d6 DA |
1099 | |
1100 | DRM_DEBUG("count: %d\n", count); | |
1101 | DRM_DEBUG("order: %d\n", order); | |
1102 | DRM_DEBUG("size: %d\n", size); | |
1103 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1104 | DRM_DEBUG("alignment: %d\n", alignment); | |
1105 | DRM_DEBUG("page_order: %d\n", page_order); | |
1106 | DRM_DEBUG("total: %d\n", total); | |
1107 | ||
1108 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1109 | return -EINVAL; | |
1110 | if (dev->queue_count) | |
1111 | return -EBUSY; /* Not while in use */ | |
1112 | ||
1113 | spin_lock(&dev->count_lock); | |
1114 | if (dev->buf_use) { | |
1115 | spin_unlock(&dev->count_lock); | |
1116 | return -EBUSY; | |
1117 | } | |
1118 | atomic_inc(&dev->buf_alloc); | |
1119 | spin_unlock(&dev->count_lock); | |
1120 | ||
30e2fb18 | 1121 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1122 | entry = &dma->bufs[order]; |
1123 | if (entry->buf_count) { | |
30e2fb18 | 1124 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1125 | atomic_dec(&dev->buf_alloc); |
1126 | return -ENOMEM; /* May only call once for each order */ | |
1127 | } | |
1128 | ||
1129 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1130 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1131 | atomic_dec(&dev->buf_alloc); |
1132 | return -EINVAL; | |
1133 | } | |
1134 | ||
1135 | entry->buflist = drm_alloc(count * sizeof(*entry->buflist), | |
1136 | DRM_MEM_BUFS); | |
1137 | if (!entry->buflist) { | |
30e2fb18 | 1138 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1139 | atomic_dec(&dev->buf_alloc); |
1140 | return -ENOMEM; | |
1141 | } | |
1142 | memset(entry->buflist, 0, count * sizeof(*entry->buflist)); | |
1143 | ||
1144 | entry->buf_size = size; | |
1145 | entry->page_order = page_order; | |
1146 | ||
1147 | offset = 0; | |
1148 | ||
1149 | while (entry->buf_count < count) { | |
1150 | buf = &entry->buflist[entry->buf_count]; | |
1151 | buf->idx = dma->buf_count + entry->buf_count; | |
1152 | buf->total = alignment; | |
1153 | buf->order = order; | |
1154 | buf->used = 0; | |
1155 | ||
1156 | buf->offset = (dma->byte_count + offset); | |
1157 | buf->bus_address = agp_offset + offset; | |
1158 | buf->address = (void *)(agp_offset + offset); | |
1159 | buf->next = NULL; | |
1160 | buf->waiting = 0; | |
1161 | buf->pending = 0; | |
1162 | init_waitqueue_head(&buf->dma_wait); | |
1163 | buf->filp = NULL; | |
1164 | ||
1165 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
1166 | buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS); | |
1167 | if (!buf->dev_private) { | |
1168 | /* Set count correctly so we free the proper amount. */ | |
1169 | entry->buf_count = count; | |
1170 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1171 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1172 | atomic_dec(&dev->buf_alloc); |
1173 | return -ENOMEM; | |
1174 | } | |
1175 | memset(buf->dev_private, 0, buf->dev_priv_size); | |
1176 | ||
1177 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1178 | ||
1179 | offset += alignment; | |
1180 | entry->buf_count++; | |
1181 | byte_count += PAGE_SIZE << page_order; | |
1182 | } | |
1183 | ||
1184 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1185 | ||
1186 | temp_buflist = drm_realloc(dma->buflist, | |
1187 | dma->buf_count * sizeof(*dma->buflist), | |
1188 | (dma->buf_count + entry->buf_count) | |
1189 | * sizeof(*dma->buflist), DRM_MEM_BUFS); | |
1190 | if (!temp_buflist) { | |
1191 | /* Free the entry because it isn't valid */ | |
1192 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1193 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1194 | atomic_dec(&dev->buf_alloc); |
1195 | return -ENOMEM; | |
1196 | } | |
1197 | dma->buflist = temp_buflist; | |
1198 | ||
1199 | for (i = 0; i < entry->buf_count; i++) { | |
1200 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1201 | } | |
1202 | ||
1203 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1204 | dma->seg_count += entry->seg_count; |
1205 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1206 | dma->byte_count += byte_count; |
1207 | ||
1208 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1209 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1210 | ||
30e2fb18 | 1211 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1212 | |
d59431bf DA |
1213 | request->count = entry->buf_count; |
1214 | request->size = size; | |
b84397d6 DA |
1215 | |
1216 | dma->flags = _DRM_DMA_USE_FB; | |
1217 | ||
1218 | atomic_dec(&dev->buf_alloc); | |
1219 | return 0; | |
1220 | } | |
d985c108 | 1221 | |
b84397d6 | 1222 | |
1da177e4 LT |
1223 | /** |
1224 | * Add buffers for DMA transfers (ioctl). | |
1225 | * | |
1226 | * \param inode device inode. | |
1227 | * \param filp file pointer. | |
1228 | * \param cmd command. | |
1229 | * \param arg pointer to a drm_buf_desc_t request. | |
1230 | * \return zero on success or a negative number on failure. | |
1231 | * | |
1232 | * According with the memory type specified in drm_buf_desc::flags and the | |
1233 | * build options, it dispatches the call either to addbufs_agp(), | |
1234 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1235 | * PCI memory respectively. | |
1236 | */ | |
b5e89ed5 DA |
1237 | int drm_addbufs(struct inode *inode, struct file *filp, |
1238 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1239 | { |
1240 | drm_buf_desc_t request; | |
1241 | drm_file_t *priv = filp->private_data; | |
1242 | drm_device_t *dev = priv->head->dev; | |
d59431bf | 1243 | int ret; |
b5e89ed5 | 1244 | |
1da177e4 LT |
1245 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1246 | return -EINVAL; | |
1247 | ||
b5e89ed5 DA |
1248 | if (copy_from_user(&request, (drm_buf_desc_t __user *) arg, |
1249 | sizeof(request))) | |
1da177e4 LT |
1250 | return -EFAULT; |
1251 | ||
1252 | #if __OS_HAS_AGP | |
b5e89ed5 DA |
1253 | if (request.flags & _DRM_AGP_BUFFER) |
1254 | ret = drm_addbufs_agp(dev, &request); | |
1da177e4 LT |
1255 | else |
1256 | #endif | |
b5e89ed5 DA |
1257 | if (request.flags & _DRM_SG_BUFFER) |
1258 | ret = drm_addbufs_sg(dev, &request); | |
1259 | else if (request.flags & _DRM_FB_BUFFER) | |
1260 | ret = drm_addbufs_fb(dev, &request); | |
1da177e4 | 1261 | else |
b5e89ed5 | 1262 | ret = drm_addbufs_pci(dev, &request); |
d59431bf | 1263 | |
b5e89ed5 DA |
1264 | if (ret == 0) { |
1265 | if (copy_to_user((void __user *)arg, &request, sizeof(request))) { | |
d59431bf DA |
1266 | ret = -EFAULT; |
1267 | } | |
1268 | } | |
1269 | return ret; | |
1da177e4 LT |
1270 | } |
1271 | ||
1da177e4 LT |
1272 | /** |
1273 | * Get information about the buffer mappings. | |
1274 | * | |
1275 | * This was originally mean for debugging purposes, or by a sophisticated | |
1276 | * client library to determine how best to use the available buffers (e.g., | |
1277 | * large buffers can be used for image transfer). | |
1278 | * | |
1279 | * \param inode device inode. | |
1280 | * \param filp file pointer. | |
1281 | * \param cmd command. | |
1282 | * \param arg pointer to a drm_buf_info structure. | |
1283 | * \return zero on success or a negative number on failure. | |
1284 | * | |
1285 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1286 | * lock, preventing of allocating more buffers after this call. Information | |
1287 | * about each requested buffer is then copied into user space. | |
1288 | */ | |
b5e89ed5 DA |
1289 | int drm_infobufs(struct inode *inode, struct file *filp, |
1290 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1291 | { |
1292 | drm_file_t *priv = filp->private_data; | |
1293 | drm_device_t *dev = priv->head->dev; | |
1294 | drm_device_dma_t *dma = dev->dma; | |
1295 | drm_buf_info_t request; | |
1296 | drm_buf_info_t __user *argp = (void __user *)arg; | |
1297 | int i; | |
1298 | int count; | |
1299 | ||
1300 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1301 | return -EINVAL; | |
1302 | ||
b5e89ed5 DA |
1303 | if (!dma) |
1304 | return -EINVAL; | |
1da177e4 | 1305 | |
b5e89ed5 DA |
1306 | spin_lock(&dev->count_lock); |
1307 | if (atomic_read(&dev->buf_alloc)) { | |
1308 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1309 | return -EBUSY; |
1310 | } | |
1311 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1312 | spin_unlock(&dev->count_lock); |
1da177e4 | 1313 | |
b5e89ed5 | 1314 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1315 | return -EFAULT; |
1316 | ||
b5e89ed5 DA |
1317 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1318 | if (dma->bufs[i].buf_count) | |
1319 | ++count; | |
1da177e4 LT |
1320 | } |
1321 | ||
b5e89ed5 | 1322 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1323 | |
b5e89ed5 DA |
1324 | if (request.count >= count) { |
1325 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { | |
1326 | if (dma->bufs[i].buf_count) { | |
1327 | drm_buf_desc_t __user *to = | |
1328 | &request.list[count]; | |
1da177e4 LT |
1329 | drm_buf_entry_t *from = &dma->bufs[i]; |
1330 | drm_freelist_t *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1331 | if (copy_to_user(&to->count, |
1332 | &from->buf_count, | |
1333 | sizeof(from->buf_count)) || | |
1334 | copy_to_user(&to->size, | |
1335 | &from->buf_size, | |
1336 | sizeof(from->buf_size)) || | |
1337 | copy_to_user(&to->low_mark, | |
1338 | &list->low_mark, | |
1339 | sizeof(list->low_mark)) || | |
1340 | copy_to_user(&to->high_mark, | |
1341 | &list->high_mark, | |
1342 | sizeof(list->high_mark))) | |
1da177e4 LT |
1343 | return -EFAULT; |
1344 | ||
b5e89ed5 DA |
1345 | DRM_DEBUG("%d %d %d %d %d\n", |
1346 | i, | |
1347 | dma->bufs[i].buf_count, | |
1348 | dma->bufs[i].buf_size, | |
1349 | dma->bufs[i].freelist.low_mark, | |
1350 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1351 | ++count; |
1352 | } | |
1353 | } | |
1354 | } | |
1355 | request.count = count; | |
1356 | ||
b5e89ed5 | 1357 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1358 | return -EFAULT; |
1359 | ||
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | /** | |
1364 | * Specifies a low and high water mark for buffer allocation | |
1365 | * | |
1366 | * \param inode device inode. | |
1367 | * \param filp file pointer. | |
1368 | * \param cmd command. | |
1369 | * \param arg a pointer to a drm_buf_desc structure. | |
1370 | * \return zero on success or a negative number on failure. | |
1371 | * | |
1372 | * Verifies that the size order is bounded between the admissible orders and | |
1373 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1374 | * | |
1375 | * \note This ioctl is deprecated and mostly never used. | |
1376 | */ | |
b5e89ed5 DA |
1377 | int drm_markbufs(struct inode *inode, struct file *filp, |
1378 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1379 | { |
1380 | drm_file_t *priv = filp->private_data; | |
1381 | drm_device_t *dev = priv->head->dev; | |
1382 | drm_device_dma_t *dma = dev->dma; | |
1383 | drm_buf_desc_t request; | |
1384 | int order; | |
1385 | drm_buf_entry_t *entry; | |
1386 | ||
1387 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1388 | return -EINVAL; | |
1389 | ||
b5e89ed5 DA |
1390 | if (!dma) |
1391 | return -EINVAL; | |
1da177e4 | 1392 | |
b5e89ed5 DA |
1393 | if (copy_from_user(&request, |
1394 | (drm_buf_desc_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1395 | return -EFAULT; |
1396 | ||
b5e89ed5 DA |
1397 | DRM_DEBUG("%d, %d, %d\n", |
1398 | request.size, request.low_mark, request.high_mark); | |
1399 | order = drm_order(request.size); | |
1400 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1401 | return -EINVAL; | |
1da177e4 LT |
1402 | entry = &dma->bufs[order]; |
1403 | ||
b5e89ed5 | 1404 | if (request.low_mark < 0 || request.low_mark > entry->buf_count) |
1da177e4 | 1405 | return -EINVAL; |
b5e89ed5 | 1406 | if (request.high_mark < 0 || request.high_mark > entry->buf_count) |
1da177e4 LT |
1407 | return -EINVAL; |
1408 | ||
b5e89ed5 | 1409 | entry->freelist.low_mark = request.low_mark; |
1da177e4 LT |
1410 | entry->freelist.high_mark = request.high_mark; |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | /** | |
b5e89ed5 | 1416 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1417 | * |
1418 | * \param inode device inode. | |
1419 | * \param filp file pointer. | |
1420 | * \param cmd command. | |
1421 | * \param arg pointer to a drm_buf_free structure. | |
1422 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1423 | * |
1da177e4 LT |
1424 | * Calls free_buffer() for each used buffer. |
1425 | * This function is primarily used for debugging. | |
1426 | */ | |
b5e89ed5 DA |
1427 | int drm_freebufs(struct inode *inode, struct file *filp, |
1428 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1429 | { |
1430 | drm_file_t *priv = filp->private_data; | |
1431 | drm_device_t *dev = priv->head->dev; | |
1432 | drm_device_dma_t *dma = dev->dma; | |
1433 | drm_buf_free_t request; | |
1434 | int i; | |
1435 | int idx; | |
1436 | drm_buf_t *buf; | |
1437 | ||
1438 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1439 | return -EINVAL; | |
1440 | ||
b5e89ed5 DA |
1441 | if (!dma) |
1442 | return -EINVAL; | |
1da177e4 | 1443 | |
b5e89ed5 DA |
1444 | if (copy_from_user(&request, |
1445 | (drm_buf_free_t __user *) arg, sizeof(request))) | |
1da177e4 LT |
1446 | return -EFAULT; |
1447 | ||
b5e89ed5 DA |
1448 | DRM_DEBUG("%d\n", request.count); |
1449 | for (i = 0; i < request.count; i++) { | |
1450 | if (copy_from_user(&idx, &request.list[i], sizeof(idx))) | |
1da177e4 | 1451 | return -EFAULT; |
b5e89ed5 DA |
1452 | if (idx < 0 || idx >= dma->buf_count) { |
1453 | DRM_ERROR("Index %d (of %d max)\n", | |
1454 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1455 | return -EINVAL; |
1456 | } | |
1457 | buf = dma->buflist[idx]; | |
b5e89ed5 DA |
1458 | if (buf->filp != filp) { |
1459 | DRM_ERROR("Process %d freeing buffer not owned\n", | |
1460 | current->pid); | |
1da177e4 LT |
1461 | return -EINVAL; |
1462 | } | |
b5e89ed5 | 1463 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1464 | } |
1465 | ||
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | /** | |
1470 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1471 | * | |
1472 | * \param inode device inode. | |
1473 | * \param filp file pointer. | |
1474 | * \param cmd command. | |
1475 | * \param arg pointer to a drm_buf_map structure. | |
1476 | * \return zero on success or a negative number on failure. | |
1477 | * | |
3417f33e GS |
1478 | * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information |
1479 | * about each buffer into user space. For PCI buffers, it calls do_mmap() with | |
1480 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls | |
1481 | * drm_mmap_dma(). | |
1da177e4 | 1482 | */ |
b5e89ed5 DA |
1483 | int drm_mapbufs(struct inode *inode, struct file *filp, |
1484 | unsigned int cmd, unsigned long arg) | |
1da177e4 LT |
1485 | { |
1486 | drm_file_t *priv = filp->private_data; | |
1487 | drm_device_t *dev = priv->head->dev; | |
1488 | drm_device_dma_t *dma = dev->dma; | |
1489 | drm_buf_map_t __user *argp = (void __user *)arg; | |
1490 | int retcode = 0; | |
1491 | const int zero = 0; | |
1492 | unsigned long virtual; | |
1493 | unsigned long address; | |
1494 | drm_buf_map_t request; | |
1495 | int i; | |
1496 | ||
1497 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1498 | return -EINVAL; | |
1499 | ||
b5e89ed5 DA |
1500 | if (!dma) |
1501 | return -EINVAL; | |
1da177e4 | 1502 | |
b5e89ed5 DA |
1503 | spin_lock(&dev->count_lock); |
1504 | if (atomic_read(&dev->buf_alloc)) { | |
1505 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1506 | return -EBUSY; |
1507 | } | |
1508 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1509 | spin_unlock(&dev->count_lock); |
1da177e4 | 1510 | |
b5e89ed5 | 1511 | if (copy_from_user(&request, argp, sizeof(request))) |
1da177e4 LT |
1512 | return -EFAULT; |
1513 | ||
b5e89ed5 | 1514 | if (request.count >= dma->buf_count) { |
b84397d6 | 1515 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1516 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1517 | && (dma->flags & _DRM_DMA_USE_SG)) |
1518 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1519 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
1da177e4 | 1520 | drm_map_t *map = dev->agp_buffer_map; |
d1f2b55a | 1521 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1522 | |
b5e89ed5 | 1523 | if (!map) { |
1da177e4 LT |
1524 | retcode = -EINVAL; |
1525 | goto done; | |
1526 | } | |
1527 | ||
b5e89ed5 DA |
1528 | down_write(¤t->mm->mmap_sem); |
1529 | virtual = do_mmap(filp, 0, map->size, | |
1530 | PROT_READ | PROT_WRITE, | |
1531 | MAP_SHARED, token); | |
1532 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1533 | } else { |
b5e89ed5 DA |
1534 | down_write(¤t->mm->mmap_sem); |
1535 | virtual = do_mmap(filp, 0, dma->byte_count, | |
1536 | PROT_READ | PROT_WRITE, | |
1537 | MAP_SHARED, 0); | |
1538 | up_write(¤t->mm->mmap_sem); | |
1da177e4 | 1539 | } |
b5e89ed5 | 1540 | if (virtual > -1024UL) { |
1da177e4 LT |
1541 | /* Real error */ |
1542 | retcode = (signed long)virtual; | |
1543 | goto done; | |
1544 | } | |
1545 | request.virtual = (void __user *)virtual; | |
1546 | ||
b5e89ed5 DA |
1547 | for (i = 0; i < dma->buf_count; i++) { |
1548 | if (copy_to_user(&request.list[i].idx, | |
1549 | &dma->buflist[i]->idx, | |
1550 | sizeof(request.list[0].idx))) { | |
1da177e4 LT |
1551 | retcode = -EFAULT; |
1552 | goto done; | |
1553 | } | |
b5e89ed5 DA |
1554 | if (copy_to_user(&request.list[i].total, |
1555 | &dma->buflist[i]->total, | |
1556 | sizeof(request.list[0].total))) { | |
1da177e4 LT |
1557 | retcode = -EFAULT; |
1558 | goto done; | |
1559 | } | |
b5e89ed5 DA |
1560 | if (copy_to_user(&request.list[i].used, |
1561 | &zero, sizeof(zero))) { | |
1da177e4 LT |
1562 | retcode = -EFAULT; |
1563 | goto done; | |
1564 | } | |
b5e89ed5 DA |
1565 | address = virtual + dma->buflist[i]->offset; /* *** */ |
1566 | if (copy_to_user(&request.list[i].address, | |
1567 | &address, sizeof(address))) { | |
1da177e4 LT |
1568 | retcode = -EFAULT; |
1569 | goto done; | |
1570 | } | |
1571 | } | |
1572 | } | |
b5e89ed5 | 1573 | done: |
1da177e4 | 1574 | request.count = dma->buf_count; |
b5e89ed5 | 1575 | DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode); |
1da177e4 | 1576 | |
b5e89ed5 | 1577 | if (copy_to_user(argp, &request, sizeof(request))) |
1da177e4 LT |
1578 | return -EFAULT; |
1579 | ||
1580 | return retcode; | |
1581 | } | |
1582 | ||
836cf046 DA |
1583 | /** |
1584 | * Compute size order. Returns the exponent of the smaller power of two which | |
1585 | * is greater or equal to given number. | |
b5e89ed5 | 1586 | * |
836cf046 DA |
1587 | * \param size size. |
1588 | * \return order. | |
1589 | * | |
1590 | * \todo Can be made faster. | |
1591 | */ | |
b5e89ed5 | 1592 | int drm_order(unsigned long size) |
836cf046 DA |
1593 | { |
1594 | int order; | |
1595 | unsigned long tmp; | |
1596 | ||
b5e89ed5 | 1597 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1598 | |
1599 | if (size & (size - 1)) | |
1600 | ++order; | |
1601 | ||
1602 | return order; | |
1603 | } | |
1604 | EXPORT_SYMBOL(drm_order); | |
d985c108 DA |
1605 | |
1606 |